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No. 609,6I3. Patented Aug. 23, |898. E. DOCTEUR. solLl-:n FunNAcE.

(Application led my 4, 1896.)

3 Sheets-Sheet l.

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. No. 609,6I3. Patented Aug. 23, |898.

' E. DUCTEUR.

BUILER FURNACE.

(Application tiled my 4, 1896.) (No Model.) 3 Sheets-Sheet 2.

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BOILER FURNACE.

(Application -1ed May 4, 1896.)

3 Sheets--Sheet 3.

(No Model.)

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A'rnNr EUGENE DOCTEUR, OF BRUSSELS, BELGIUM.

BOlLER-FURNACE.

SPECIFICATION forming part of Letters Patent No. 609,613, dated August 23, 1898.

Applicatign led May 4, 1896. Serial NoI 590,190. (No model.) Patentedin Belgium May 24,1894,No.110,141,a11din France June 16,1894,N0.226,216.

To LZZ whom t may concern:

Be it known that I, EUGENE DOCTEUR, engineer,a subject of the King of Belgium,residing at Brussels, in the Kingdom of Belgium, have invented a new and useful Improved Method in Smokeless Boiler Furnaces, (for which patents have been obtainedin Belgium, dated May 24, 1394, No. 110,141, and in France, dated June 16, 1894, No. 22G,216,) of which the followin gis a full, clear, and exact description.

This invention relates `to improvements in that kind of smokeless boiler furnaces in which atmospheric air is introduced into the furnace immediately above the layer of fuel covering the fire-grate; and the invention consists in the peculiar arrangement of the interior channeled coating or wall of the furnace, through which channels the air is supplied in order to lobtain the highest possible smokeconsuming action. This improved arrangement affords a supply of air from the two sides of the furnace and throughout its whole length by laterally and alternatively extending air-exhaust openings, through which the air is constantly blown over the fuel la'yer, and thus raised to high temperature, providing for absolutecomplete combustion of the smoke rising from the fuel.

The furnace arrangement consists, substantially, in the provision of a casing of semicylindrical or other suitable form lined with fire-brick or other suitable refractory plates suitably pierced with hollow passages or airchannels of any convenient section. Each of these channels is so arranged that it opens at stantly supplied with alternately-opposed blasts of air mingling with ea'ch other through over the whole fuel-surface. Owing to this arrangement there are thus two supplies of air into the furnace-viz., the ordinary supply through the grate-bars coming from the under side and the new supply having its entrance onto the upper side by circulating through the fire-brick channels and cooling the casing,while the traversing air is brought to an excessively high temperature in the furnace, and as the proportion of air-supply ments, as the new furnace will take simply the place of the old ones, or those latter be simply transformed, so as to constitute the new furnace.

Now in order to more clearly show the construction of my improved boiler-furnace I 'have illustrated an example of it as being applied to a locomotive in the annexed drawings, of which- Figure 1 isa side elevation of locomotive with the new furnace in longitudinal section, while Fig. 2 is a transverse section through the boiler-furnace, showing parts of the locomotive in end elevation view. Fig. 2 is a horizontal section of the same. Fig. 3 is a longitudinal section of a part of the furnacelining, showing one part of the refractory partition. Fig. 4t is a transverse section of the partition through one of the channel-ways. Fig. 5 shows another form of partition.

As will be understood without further explanation by the arrows, air is admitted to the channel orpassage L by the exterior side aperture O, while -t-he exhaust of air takes place through the interior aperture D, the two horizontally-arranged openings being directed to the same side-that into the right-hand for one of the channels and to the left-hand for the next following channel, as it will be seen. from Figs. 3 and 5. The plates or channel-ways of semicircular feature in the present instance may be made so as to follow any other required furnace shape without any departure from the invention, and also of any peculiar shape of making.` So each of 4,the arch-pieces S (shown in Fig. 5) is 'made in one single IOO curved plate longitudinally pierced With the channels, and thus inserted at their place in the furnace in one single piece entirely iinished, While the construction shown in Fig. 3 differs therefrom in so far as the arch-pieces S are simply grooved at their upper surface, and these grooves covered With suitable upper plates S', the free intervals thus forming the channel-Ways L and the upper plates S being held in place by a suitable exterior metal plate E, extending over the Whole of the furnace. The arch-pieces are provided laterally on one side with a rib and the opposite side With a groove, so that the rib of the one iits Within the groove of the next-following one.

The locomotive boiler-furnace F, Fig. l, is arranged in the just-noW-described manner, which I consider as a 4most perfect shape of making among other suitable varieties.

As will be seen in Fig. l, there is an airdraft entering beloW the boiler at the front part of the machine into a jacket C, which leads to and surrounds the boiler-furnace.

In this jacket C open the admission-holes O 2 of the air-fines, as shown in Fig. 2, and from there it is exhausted through the inner apertures D over the fuel-bed on thegrate, as described.

I claim- Y In a locomotive-furnace, for the distribution of the hot air by adjacent jets directed alternately in contrary senses, an interior lining having independent passages for each jet of air, of the said interior lining being thus divided into hollow arches, each one of which is an independent air-passage Which communicates alternately, on the one hand With the external air, and on the other hand With the interior ofthe furnace above the layer of combustible, substantially as described and Shown.

EUGENE DOCTEUR. Vitnesses:

AUG. JoERIssEN, GREGORY PHELAN. 

